Question

【題目】The idea of being able to walk on water has long interested humans greatly. Sadly, biological facts prevent us ever accomplishing such a thing without artificial aid—we simply weigh too much，and all our mass pushes down through our relatively small feet, resulting in a lot of pressure that makes us sink.

However, several types of animals can walk on water. One of the most interesting is the common basilisk Basilicusbasilicus, a lizard (蜥蜴) native to Central and South America. It can run across water for a distance of several metres, avoiding getting wet by rapidly hitting the water's surface with its feet. The lizard will take as many as 20 steps per second to keep moving forward. For humans to do this, we'd need huge feet that we could bring up to our ears in order to create adequate “hitting”．

But fortunately there is an alternative: corn flour. By adding enough of this common thickening agent to water (and it does take a lot), you can create a “nonNewtonian” liquid that doesn't behave like normal water. Now, if the surface of the water is hit hard enough, particles(粒子) in the water group together for a moment to make the surface hard. Move quickly enough and put enough force into each step, and you really can walk across the surface of an adequately thick liquid of corn flour.

Fun though all this may sound, it's still rather messy and better read about in theory than carried out in practice. If you must do it, then keep the water wings handy in case you start to sink—and take a shower afterwards!

【1】What do we know about Basilicusbasilicus from the passage?

A. It is light enough to walk on water.

B. Its huge feet enable it to stay above water.

C. It can run across water at a certain speed.

D. Its unique skin keeps it from getting wet in water.

【2】What is the function of the corn flour according to the passage?

A. To create a thick liquid.

B. To turn the water into solid.

C. To help the liquid behave normally.

D. To enable the water to move rapidly.

【3】What is the author's attitude towards the idea of humans' walking on water?

A. It is risky but beneficial.

B. It is interesting and worth trying.

C. It is crazy and cannot become a reality.

D. It is impractical though theoretically possible.

Answer 1

【答案】

【1】C

【2】A

【3】D

【解析】人類有一個一直感興趣但一直未能實現(xiàn)的愿望：水上行走。不能實現(xiàn)的原因是“生物性局限”。本文主要介紹了一種理論上可行實際上難以實現(xiàn)的人類水上行走的方法：借助玉米粉（cornflour）增加水面濃度。

【1】細節(jié)理解題。根據(jù)第二段“It can run across water for a distance of several meters, avoiding getting wet by rapidly hitting the water’s surface with its feet”一句可知，這種蜥蜴能在水面行走是因為速度快（每秒鐘達到20步）。選擇 C

【2】細節(jié)理解題。第三段介紹了用一定稠密度的玉米粉末來增加水面厚度的方法，它可以使人類在水上行走。 “this common thickening agent”明確這是一種“常見的增稠劑”。選擇A。

【3】推理判斷題。根據(jù)短文最后一段中的“…it's still rather messy and better read about in theory than carried out in practice.”(這個方法還是很沒道理，可以權(quán)當高級理論談?wù)摰�不宜付諸實施)，且最后說如果有人一定要嘗試的話，最好配備救生設(shè)施以防不測。由此說明用玉米粉末鋪墊水面來行走理論上可行，實際上卻無法操作。故選D。